Canadian Patents Database / Patent 2794571 Summary

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(12) Patent: (11) CA 2794571
(54) English Title: SHOCK RESISTANT LOCK
(54) French Title: SERRURE RESISTANT AUX CHOCS
(51) International Patent Classification (IPC):
  • E05B 17/20 (2006.01)
  • E05B 47/02 (2006.01)
(72) Inventors :
  • WORM, STEVEN L. (United States of America)
  • CHRISTOPHERSON, DAVID G. (United States of America)
  • CLARK, MICHAEL R. (United States of America)
(73) Owners :
  • SARGENT AND GREENLEAF, INC. (United States of America)
(71) Applicants :
  • SARGENT AND GREENLEAF, INC. (United States of America)
(74) Agent: LOOPSTRA NIXON LLP
(74) Associate agent:
(45) Issued: 2017-08-15
(86) PCT Filing Date: 2011-04-07
(87) Open to Public Inspection: 2011-10-13
Examination requested: 2012-09-25
(30) Availability of licence: N/A
(30) Language of filing: English

(30) Application Priority Data:
Application No. Country/Territory Date
61/321,619 United States of America 2010-04-07

English Abstract

A lock assembly (30, 30') is provided that includes a housing (32), a rotary bolt (36) or a translating bolt (36'), and a bolt blocker (38) that moves between a blocking position blocking movement of the bolts (36, 36') and an unblocking position permitting the bolts (36, 36') to move to a retracted position. The lock assemblies (30, 30') are resistant to shocks being applied to the locks assemblies (30, 30') in an effort to open the lock assemblies (30, 30') without authorization.


French Abstract

L'invention porte sur un ensemble serrure (30, 30'), lequel ensemble comprenant un boîtier (32), un boulon tournant (36) ou un boulon à va-et-vient (36'), et un élément de blocage de boulons (38) qui se déplace entre une position de blocage, bloquant le déplacement des boulons (36, 36'), et une position de déblocage, permettant aux boulons (36, 36') de se déplacer vers une position rétractée. Les ensembles serrures (30, 30') sont résistants à des chocs qui sont appliqués aux ensembles serrures (30, 30') lors d'un effort pour ouvrir les ensembles serrures (30, 30') sans autorisation.


Note: Claims are shown in the official language in which they were submitted.

Claims:
1. A lock assembly for securing a container having an interior region, the
lock assembly
including:
a housing,
a bolt moveable relative to the housing between an extended position
inhibiting
access to the interior region of the container and a retracted position to
facilitate access to
the interior region,
a blocking lever rotating relative to the housing between a blocking position
blocking movement of the bolt to the retracted position and an unblocking
position
permitting the bolt to move to the retracted position, the blocking lever
having a first lever
arm and a second lever arm, and
a positioning assembly including
a threaded shaft,
a motor that rotates the threaded shaft, and
a nut that moves relative to the housing along the threaded shaft as the
motor rotates the threaded shaft to adjust amount of torque applied to the
blocking lever by
the nut;
wherein the nut includes a nut body and a circular member supported by the nut

body, the circular member rolling on the bolt blocker as the nut moves
relative to the
housing along the threaded shaft.
2. The lock assembly of claim 1, wherein the circular member is a sphere.
3. The lock assembly of claim 1, wherein the nut further includes a spring
urging the
circular member toward the blocking lever.
4. The lock assembly of claim 1, wherein the positioning assembly further
includes a
sensor positioned to detect the position of the blocking lever, the motor is
controlled by
sensor input generated by the sensor, and the motor moves the nut in response
to the sensor
detecting the blocking lever moving to the blocking position from the
unblocking position.
13

5. The lock assembly of claim 4, wherein the motor moves the nut from an
intermediate position to a terminal position in response to the sensor, the
nut contacting the
blocking lever and permitting movement of the blocking lever when in the
intermediate
position, and the nut contacting the blocking lever and blocking movement of
the blocking
lever when in the intermediate position.
6. The lock assembly of claim 5, wherein the nut includes a nut body and a
circular
member, the nut body having an interior region having a first portion
permitting movement
of the circular member and a second portion blocking movement of the circular
member,
the circular member contacting the second portion when the nut is moved to the
terminal
position.
7. The lock assembly of claim 1, wherein the nut moves between a first
terminal
position, an intermediate position, and a second terminal position, the nut
applies torque to
the blocking lever in an opposite second direction when the nut is in the
intermediate and
second terminal position.
8. The lock assembly of claim 1, wherein the nut applies a linear force to
the blocking
lever in a third direction when in the intermediate position and applies
linear force to the
blocking lever in a fourth direction when in the second terminal position that
is different
than the third direction.
14

Note: Descriptions are shown in the official language in which they were submitted.

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SHOCK RESISTANT LOCK
[1] Continue to [2].
Background and Summary of the Invention
[2] The present invention relates generally to locks. More particularly,
the
present invention related to locks that are more difficult, if not impossible,
to open when a
shock or impact force is applied in an effort to defeat the lock.
[3] According to one aspect of the present invention, a lock assembly is
provided
for securing a container having an interior region. The lock assembly includes
a housing, a
bolt moveable relative to the housing between an extended position inhibiting
access to the
interior region of the container and a retracted position to facilitate access
to the interior
region, and a blocking lever rotating relative to the housing between a
blocking position
blocking movement of the bolt to the retracted position and an unblocking
position
permitting the bolt to move to the retracted position. The blocking lever has
a first leaver
arm and a second lever arm. The lock assembly further includes a positioning
assembly
including a threaded shaft, a motor that rotates the threaded shaft, and a nut
that moves
relative to the housing along the threaded shaft as the motor rotates the
threaded shaft to
adjust amount of torque applied to the blocking lever by the nut.
[4] According to another aspect of the present disclosure, a lock assembly
is
provided for securing a container having an interior region. The lock assembly
includes a
housing, a bolt moveable between a locked position to inhibit access to the
interior region of
the container and an unlocked position to facilitate access to the interior
region, a bolt
blocker moveable between a blocking position to inhibit movement of the bolt
to the
unlocked position and an unblocking position to facilitate movement of the
bolt to the
retracted position, and a positioning assembly moveable between a first
position applying a
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force to a first location on the bolt blocker and a second position applying a
force to a second
location on the bolt blocker to change the position of the bolt blocker.
[5] According to another aspect of the present invention, a lock assembly
is
provided for securing a container having an interior region. The lock assembly
includes a
housing, a bolt moveable relative to the housing between an extended position
inhibiting
access to the interior region of the container and a retracted position to
facilitate access to the
interior region, a bolt blocker rotating relative to the housing between a
blocking position
blocking movement of the bolt to the retracted position and an unblocking
position
permitting the bolt to move to the retracted position. The bolt blocker
translates relative to
the housing between a first position and a second position when external force
is applied to
the bolt.
[6] According to another aspect of the present invention, a lock assembly
is
provided for securing a container having an interior region. The lock assembly
includes a
housing,a bolt moveable relative to the housing between an extended position
inhibiting
access to the interior region of the container and a retracted position to
facilitate access to the
interior region, a bolt blocker movable relative to the housing between a
blocking position
blocking movement of the bolt to the retracted position and an unblocking
position
permitting the bolt to move to the retracted position, and a positioning
assembly including an
electric machine that moves the bolt blocker between the blocking and
unblocking positions.
The electric machine floats relative to the housing to permit relative
movement of the electric
machine relative to the housing. The lock assembly further includes a
compliant member
positioned between the electric machine and the housing to absorb impact of
the electric
machine resulting from relative movement of the electric machine relative to
the housing.
[7] According to another aspect of the present invention, a lock assembly
is
provided for securing a container having an interior region. The lock assembly
includes a
housing having an interior region, and at least one of a rotary bolt adapted
to rotate relative to
the housing between an extended position inhibiting access to the interior
region of the
container and a retracted position to facilitate access to the interior region
of the container
and a translating bolt adapted to translate relative to the housing between an
extended
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position inhibiting access to the interior region of the container and a
retracted position to
facilitate access to the interior region of the container. The housing is
adapted to receive the
rotary bolt and the translating bolt. At least one of the rotary bolt and the
translating bolt are
positioned within the interior region of the housing to move between the
extended position
and retracted position.
[8] According to another aspect of the present invention, a lock assembly
is
provided for securing a container having an interior region. The lock assembly
includes a
housing, a bolt moveable relative to the housing between an extended position
inhibiting
access to the interior region of the container and a retracted position to
facilitate access to the
interior region, a bolt blocker movable relative to the housing between a
blocking position
blocking movement of the bolt to the retracted position and an unblocking
position
permitting the bolt to move to the retracted position, and a positioning
assembly movable
between first, second, and third positions. The positioning assembly blocks
movement of the
bolt blocker from the blocking position when in the first position. Movement
of the
positioning assembly from the first position to the second position allows the
bolt blocker to
move to the unblocking position. When in the third position, the positioning
assembly resists
movement of the bolt blocker to the first position.
[9] According to another aspect of the present invention, a lock assembly
is
provided for securing a container having an interior region. The lock assembly
includes a
housing, a bolt moveable relative to the housing between an extended position
inhibiting
access to the interior region of the container and a retracted position to
facilitate access to the
interior region, a bolt blocker movable relative to the housing between a
blocking position
blocking movement of the bolt to the retracted position and an unblocking
position
permitting the bolt to move to the retracted position, and a compliant member
positioned to
urge the bolt blocker toward the blocking position. The bolt blocker is
movable against the
complaint member from a first extreme position to second extreme position. The
bolt
blocker blocks movement of the bolt when in the first extreme position. The
bolt blocker
blocks movement of the bolt when in the second extreme position.
[10] According to another aspect of the present invention, a lock assembly
is
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provided for securing a container having an interior region. The lock assembly
includes a
housing, a bolt moveable relative to the housing between an extended position
inhibiting
access to the interior region of the container and a retracted position to
facilitate access to the
interior region, a bolt blocker movable relative to the housing between a
blocking position
blocking movement of the bolt to the retracted position and an unblocking
position
permitting the bolt to move to the retracted position, and a compliant member
positioned to
urge the bolt blocker toward the blocking position. The bolt blocker has a
range of motion
against the compliant member that is insufficient to move the bolt blocker to
the unblocking
position.
[ 1 1] According to another aspect of the present invention, a method of
securing a
container having an interior region is provided. The method includes the steps
of providing a
lock assembly including a housing, a bolt moveable between a locked position
to inhibit
access to the interior region of the container and an unlocked position to
facilitate access to
the interior region, a bolt blocker moveable between a blocking position to
inhibit movement
of the bolt to the unlocked position and an unblocking position to facilitate
movement of the
bolt to the retracted position, and a positioning assembly. The method further
includes the
step of moving the positioning assembly between a first location applying
force on the bolt
blocker and a second position applying a force to a second location on the
bolt blocker to
change the position of the bolt blocker.
[12] According to another aspect of the present disclosure, a method of
securing a
container having an interior region is provided. The method includes the steps
of providing a
lock assembly including a housing, a bolt moveable between a locked position
to inhibit
access to the interior region of the container and an unlocked position to
facilitate access to
the interior region, a bolt blocker moveable between a blocking position to
inhibit movement
of the bolt to the unlocked position and an unblocking position to facilitate
movement of the
bolt to the retracted position, and a positioning assembly. The method further
includes
moving the positioning assembly the a first location blocking the bolt blocker
from moving
to the unblocking position, moving the positioning assembly to a second
location urging the
bolt blocker toward the unblocking position, and moving the positioning
assembly to a third
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location urging the bolt blocker toward the blocking position.
Brief Description of the Drawings
[13] The detailed description of the drawings particularly refers to the
accompanying figures in which:
[14] Fig. 1 is a perspective view of a safe showing the safe cabinet in
phantom, the
bolt works in solid lines, and a lock in solid lines;
[15] Fig. 2 is a elevational view of the lock showing the lock including a
case and
rotary bolt in an extended position to block movement of the bolt works and a
bolt blocker
positioned to block retraction of the rotary bolt;
[16] Fig. 3 is a cross-sectional view taken along line 3-3 of Fig. 2
showing a
portion of the bolt blocker and a nut including a spring-biased ball that
contacts the bolt
blocker;
[17] Fig. 4 is a cross-sectional view taken along line 4-4 of Fig. 2
showing the nut
of Fig. 3 driven to a position by a threaded shaft extending into the nut and
a motor driving
the nut;
[18] Fig. 5 is a view similar to Fig. 2 showing the nut driven to a raised
position
rotating the bolt blocker and allowing the bolt works to retract the rotary
bolt into the case;
[19] Fig. 6 is a view similar to Fig. 2 showing the nut driven back to an
intermediate position urging the bolt blocker toward the rotary bolt;
[20] Fig. 7 is a view similar to Fig. 2 showing rotary bolt extending out
of the case
and the bolt blocker urged by the nut into a notch in the rotary bolt;
[21] Fig. 8 is a view similar to Fig. 2 showing an alternative embodiment
lock with
a linear bolt and the bolt blocker of Fig. 2 positioned to block retraction of
the linear bolt;
[22] Fig. 9 is a view similar to Fig. 8 showing the nut driven to a raised
position
rotating the bolt blocker and allowing the linear bolt to retract into the
case;
[23] Fig. 10 is a view similar to Fig. 8 showing the nut driven back to an
intermediate position urging the bolt blocker toward the linear bolt; and
[24] Fig. 11 is a view similar to Fig. 8 showing linear bolt extending out
of the case

CA 02794571 2016-05-26
and the bolt blocker urged by the nut into a notch in the linear bolt.
Detailed Description of Illustrative Embodiments
[25] The embodiments disclosed below are not intended to be exhaustive or
to
limit the invention to the precise forms disclosed in the following detailed
description.
Rather, the embodiments are chosen and described so that others skilled in the
art may utilize
their teachings.
[26] As shown in Fig. 1, a container, such as a safe 10 is shown including
a case 12
(shown in phantom) defining an interior region 14, a door 16 (shown in
phantom) pivotably
coupled to case 12 to normally block access to interior region 14. Door 16 may
be opened by
authorized users to permit access into interior region 14 and the objects
stored therein (not
shown).
[27] Safe 10 further includes bolt works 18 that normally blocks opening of
door
16 and a lock 20 that normally blocks operation of bolt works 18. Bolt works
18 may be
supported on door 16 and includes one or more bolts 22 that extending across
the interface
between door 16 and case 12 into apertures (not shown) in case 12 to prevent
opening of the
door 16. Bolts 22 are coupled to a throw member 24. Bolt works 18 further
includes a
handle 25 coupled to a lever 26. When handle 25 is rotated, lever 26 rotates
to translate
throw member 24 to the left (as shown in Fig. 1), unless lock 20 is blocking
this translation.
Sufficient translation of throw member 24 when pull bolts 22 from the
apertures in case 12
and allow door 16 to be opened. Additional details of a suitable bolt works is
provided in
U.S. Patent No. 5,142,890 to Uyeda et al.
[28] As mentioned above, lock 20 normally blocks movement of bolt works 18;

and, therefore, unlocking of door 16. Lock 20 includes an access control point
28 (shown in
phantom), such as a round key pad, and a lock assembly 30. Access control
point 28
provides instructions to lock assembly 30 on when to allow safe 10 to be
opened. Lock
assembly 30 controls blocking of bolt works 18.
[29] As shown in Fig. 1, lock assembly 30 includes a housing 32 and a bolt
34 that
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extends from housing 32. When extended and in a locked state, bolt 34 blocks
movement of
throw member 24 and bolts 22. When extended and in an unlocked state, bolt 34
allows
movement of throw member 24 and bolts 22 to allow opening of door 16.
[30] Lock assembly 30 shown in Figs. 1-7 includes a rotary bolt 36. Lock
assembly 30' shown in Figs. 8-11 includes a linear bolt 36'. Otherwise, lock
assembly 30' is
very similar to lock assembly 30. As such, common structures will be described
and
illustrated using the same reference numbers.
[31] In addition to safes, lock assemblies 30, 30' may be used on other
containers
and devices providing secure access. For example, lock assemblies 30, 30" may
be provided
on ATM's, filing cabinets, rooms, and other devices requiring secure access.
Such devices
may have cases with sliding doors. For example, filing cabinets have a case
defining an
interior region and a sliding drawer with a door defining the face of the door
blocking access
to the interior region.
[32] As shown in Fig. 2, lock assembly 30 includes a bolt blocker 38 that
controls
the ability of rotary bolt 36 to retract. Rotary bolt 36 rotates about rotary
bolt shafts 39 in
rotary bolt shaft-receiving apertures 41.
[33] Bolt blocker 38 includes a blocking lever or lever body 40 having
first and
second arms 42, 44 and a pair of pivot pins 46 (one shown in Fig. 2). Pivot
pins 46 are
received in identical oval-shaped recesses or slot 49 in housing 32 and a lock
cover 33 (see
Figs. 3 and 4). Pins 46 pivot in recesses 49 to allow lever body 40 to pivot.
[34] Lock assembly 30 further includes positioning assembly including a nut
48
and an electric machine, such as a motor assembly 50 that drives nut 48
between several
positions. Motor assembly 52 includes a motor 54 having a housing 55 and a
threaded shaft
56 that extends into nut 48. According to alternative embodiments of the
present disclosure,
other electric machines, such as a solenoid or other electric machines, may be
provided.
[35] Nut 48 includes a nut body 57 and a circular member 58 at least
partially
positioned in nut body 57 as shown in Fig. 3. Circular member 58 is preferably
a ball-shaped
contact member, but may be other circular shapes, such as a cylinder, or non-
circular shapes.
As shown in Fig. 3, nut body 57 includes a recess 60 including a cylindrical
portion 62
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having a diameter 64 equal to or slightly larger than a diameter of ball 58 to
allow ball 58 to
move within cylindrical portion 62 against the bias of a spring 66 positioned
in recess 60.
Recess 60 further includes a conical portion 68 and another cylindrical
portion 70 that
receive portions of spring 66. Spring 66 urges ball 58 outward and against
second arm 44 of
bolt blocker 38 causing bolt blocker 38 to be biased in the counter-clockwise
direction when
nut 48 is in the position shown in Fig. 2.
[36] When in the position shown in Fig. 2, bolt blocker 38 is in a blocking
position
and prevents rotary bolt 36 from retracting. A tip 72 of first arm 42 of bolt
blocker 38 is
positioned in a notch 74 of rotary bolt 36. If external force, such as from
bolt works 18, is
applied to rotary bolt 36, bolt blocker 38 slides down recess 49 in direction
76 until second
arm 44 of bolt blocker 38 contacts wall 78 of housing 32. Lever body 40 is
then under
compression and bears most, if not all, of the external force being applied by
rotary bolt 36.
Because pins 46 bear little, if any of this external force, they are not
subject to much, if any,
shearing load. Thus, enough force to crush or buckle lever body 40 (or wall 78
of housing
32) must be applied through rotary bolt 36 before lock assembly 30 will yield.
Such force is
difficult, if not impossible, to apply through bolt works 18. As a result,
lock assembly 30 is
very difficult to unlock through forced entry.
[37] As mentioned above, safe 10 includes access control point 28 that
receives
access codes in the form of passwords or access codes, from a person, access
cards, fobs, or
from other sources. If access control point 28 receives a valid access code,
it instructs lock
assembly 30 to permit access to interior region 14 of safe 10. Upon receipt of
such
instructions, electric motor 54 rotates threaded shaft 56 is a direction that
causes nut 48 to
move in direction 80. Initially, the force applied by ball 58 on bolt blocker
38 is below the
axis of rotation of pins 46 so that bolt blocker 38 continues to be biased in
the counter-
clockwise direction. As nut 48 continues to move in direction 80, the force
applied by ball
58 on bolt blocker 38 passes through the axis of rotation of pins 46 so that
bolt blocker 38 is
no longer biased in the counter-clockwise direction. As motor 54 and threaded
shaft 56
continue to move nut 48 toward motor 54, the force applied by ball 58 is above
the axis of
rotation of pins 46 so that bolt blocker 38 is biased in the clockwise
direction. During this
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movement, the rotational force of toque applied to bolt blocker 38 changes
directions. This
bias causes bolt blocker 38 to rotate in clockwise direction 82 to an
unblocking position so
that tip 72 of bolt blocker 38 is no longer positioned in notch 74 as shown in
Fig. 5.
[38] Because bolt blocker 38 is in the unblocking position with tip 72 of
bolt
blocker 38 away from notch 74, it no longer blocks rotation of rotary bolt 36
caused by
external forces, such as bolt works 18. As discussed above, throw member 24
translates as
handle 25 rotates in the direction to open safe 10. When bolt blocker 38 is in
the unlatched
position, throw member 24 pushes on rotary bolt 36 and causes rotary bolt 36
to move into
housing 32, as shown in Fig. 5. Because rotary bolt 36 no longer blocks
translation of throw
member 24, bolts 22 no longer block door 16 from being open.
[39] Normally, lock 20 allows a predetermined time for door 16 to be
opened. If
this time has passed or another triggering event occurs, lock assembly 30
begins the process
of re-securing door 16. After the trigger event, motor 54 and threaded shat 56
move nut 48
down in direction 79 as shown in Fig. 6. During this movement, the force
applied by ball 58
moves from applying a clockwise force to bolt blocker 38 to again applying a
counter-
clockwise force.
[40] As shown in Fig. 6, ball 58 applies a force to a first ramped surface
83 of bolt
blocker 36 in a counter-clockwise direction causing bolt blocker 38 to rotate
(such rotation is
not shown in Fig. 6). The movement of ball 58 along ramped surface 83 is
limited by a
finger or stop 81 on bolt blocker 38. During the downward movement of nut 48,
nut 48 will
contact finger 81 if it attempts to travel too far. By limiting the movement
of nut 48, the
movement of ball 58 is also limited. The further ball 58 moves along ramped
surface 83, the
more ball 58 compresses spring 66. As the compression increases, the force
applied against
ball 58 increases, which increases the force applied by ball 58 on rotary bolt
36. Thus, by
limiting the travel of nut 48, the amount of force applied by ball 58 on
rotary bolt 36 is also
limited. Additionally, friction between finger 81 and nut 48 resists, but does
not prevent, the
ability of bolt blocker 38 to rotate towards rotary bolt 36. By resisting this
rotation, less
force is applied to bolt blocker 38 by ball 38 and bolt blocker 38 applies
less force on rotary
bolt 36 so that spring 84 has sufficient force to extend rotary bolt 36 out of
housing 32.
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[41] With the application of the counter-clockwise force by ball 58, bolt
blocker 38
moves counter-clockwise and into contact with rotary bolt 36. If bolt works 18
failed to
rotate rotary bolt 36 into housing 32 (ex. the authorized person failed to
open bolt works 18
in a timely manner), tip 72 would be positioned in notch 74 of rotary bolt 36
and again block
movement of rotary bolt 36 into housing 32, as shown in Fig. 2.
[42] If rotary bolt 36 was moved inside housing 32 by bolt works 18, bolt
blocker
38 would move to a position contacting rotary bolt 36 due to the counter-
clockwise force
applied by ball 58. When bolt works 18 are moved to the locked position, throw
member 24
provides clearance for rotary bolt 36. torsion spring 84 rotates rotary bolt
36 outward to the
position shown in Fig. 7. As rotary bolt 36 rotates, bolt blocker 38 rides on
an edge 86 of
rotary bolt 36 until tip 72 is again positioned in notch 74 as shown in Fig.
7.
[43] During this movement, movement of bolt blocker 38 is detected by a
sensor.
For example, a lug 88 of bolt blocker 38 strikes a switch 90 mounted on a PCB
92 as shown
in Fig. 7. When switch 90 is moved by lug 88, the controller (not shown)
recognizes that
bolt blocker 38 is again positioned in notch 74. In response, the controller
powers motor 54
to continue moving nut 48 downward in direction 79 until it strikes a portion
of housing 32
as discussed below. As nut 48 moves further downward, ball 58 moves further
into recess 60
until is touches conical portion 68 so that ball 58 substantially bottoms out
in nut body 57.
Because ball 58 is substantially bottomed out, bolt blocker 38 is unable to
rotate clockwise a
sufficient distance, if at all, for tip 72 to leave notch 74 of rotary bolt
36. Thus, if something
applies an impact or physical shock to lock 20, bolt blocker 38 will continue
to block
retraction of rotary bolt 36.
[44] Movement of nut 48 alters the range of motion of bolt blocker 38. For
example, when in the position shown in Fig. 2, bolt blocker 38 has a limited
range of motion
against ball 58 that is insufficient to allow bolt blocker 38 to move from
blocking position
blocking retraction of rotary bolt 36 to the unblocking position permitting
retraction of rotary
bolt 36. When nut 48 moves to the position shown in Fig. 6, bolt blocker 38
has a greater
range of motion against ball 48 and can move from the unblocking position to
the blocking
position. Thus, by operating motor 54 to move nut 48, the range of motion of
bolt blocker 38

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is adjusted as is the range of motion of ball 58.
[45] According to one embodiment of the present disclosure, electric motor
54 is
battery operated. As discussed above, motor 54 rotates shaft 56 to move nut 48
along shaft
56. The controller on PCB 92 monitors the electric current pulled by motor 54
to determine
the position of nut 48 along shaft 56. When nut 48 reaches its end of travel
on shaft 56,
motor 54 draws additional current because nut 48 encounters additional
resistance (ex. when
nut 48 strikes either of walls 88, 90 of housing 32). The controller monitors
this increased
current and determines that nut 48 has reached its end position. The
controller then turns off
the electrical power supplied to motor 54.
[46] Threaded shaft 56 includes a lead (i.e. the distance that nut 48
advances for
one revolution of shaft 56). To reduce the likelihood of nut 48 from sticking
or jamming at
the ends of travel the lead should sufficiently large. The necessary lead
depends primarily
upon the diameter of shaft 56 and the coefficient of friction between nut 48
and shaft 56.
The nominal diameter of this shaft 56 is .156" and the lead is at least .094".
[47] As shown in Fig. 3, a compliant member, such as leaf spring 91
supports
motor 54 in an axial direction. Motor 54 floats within housing 32 to allow for
unrestrained
alignment of the components, such as nut 48 and shaft 56. Because of this
floating, motor 54
may move relative to housing 32 during operation, creating linear inertia in
motor 54.
[48] Leaf spring 91 is positioned in notches 94 in housing 32 and cover 33
and
may be secured to motor 54. As nut 48 approaches wall 88, nut 48 (and often
motor 54) has
linear inertia and the rotor (not shown) of motor 52 and threaded shaft 56
have rotational
inertia. Upon impact of nut 48 into wall 88, the kinetic energy of these
inertias is absorbed
by leaf spring 91 shown in Fig. 4. For example, when nut 48 runs into wall 88,
leaf spring 91
bends slightly to the right to absorb the kinetic energy and motor 52 and
threaded shaft 56
also move slightly to the right. Leaf spring 91 (or another such spring) may
also be used to
reduce the impact of nut 48 into wall 90. If motor 54 is attached to leaf
spring 91, leaf spring
91 will bend to the left upon impact of nut 48 into wall 90. Springs other
than leaf spring 91
may also be used to lessen the shock of nut 98 impacting walls 88 or 90. For
example, a coil
spring, elastic material, or other springs may be used.
11

CA 02794571 2012-09-25
WO 2011/127310 PCT/US2011/031620
[49] Lock assembly 30' is shown in Figs. 8-11. As mentioned above, lock
assembly 30 includes a linear bolt 36'. Bolt blocker 38 bolts retraction of
linear bolt 36' in a
manner similar to that for rotary bolt 36. If external force is applied to
linear bolt 36' (or
rotary bolt 36), bolt blocker 38 will slide down oval-shaped recesses 49 so a
compressive
load is applied to bolt blocker 38. When bolt blocker 38 is rotated so that
liner bolt 36' can
be retracted, a user rotates access control point 28, which may be a circular
key pad dial. A
spindle (not shown) extends through housing 32 and into spindle-receiving
aperture 96. The
spindle couples to a leg 98 of linear bolt 36' through a cam or other
mechanism. The user
rotates access control point 28, causing the spindle to rotate to retract
linear bolt 36'. When it
is time to re-secure safe 10, the user rotates the access control point 28 in
the opposite
direction to extend linear bolt 36'.
[50] As mentioned above, many of the components of rotary lock assembly 30
and
direct drive/translating lock assembly 30' are identical. Some features
provided for rotary
lock assembly 30, such as shaft-apertures 41, are provided in translating lock
assembly 30'
that are unnecessary. Similarly, some features provided for translating lock
assembly 30',
such as spindle-receiving aperture 96, are provided in rotary lock assembly 30
that are
unnecessary. As a result, several regions are adapted to receive components,
but are devoid
of these components, such as shaft-aperture 41 being devoid of shafts in
translating lock
assembly 30' and spindle-receiving aperture 96 being devoid of a spindle in
rotary lock
assembly 30.
[51] Many of the features and sub-features described herein function
partially or
totally independently of each other. Thus, many features and sub-features are
optional
depending on the needs of the particular circumstances. Additionally, features
and sub-
features described herein with reference to a particular embodiment may also
be provided on
the other embodiments described herein.
12

A single figure which represents the drawing illustrating the invention.

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Admin Status

Title Date
Forecasted Issue Date 2017-08-15
(86) PCT Filing Date 2011-04-07
(87) PCT Publication Date 2011-10-13
(85) National Entry 2012-09-25
Examination Requested 2012-09-25
(45) Issued 2017-08-15

Abandonment History

There is no abandonment history.

Maintenance Fee

Last Payment of $200.00 was received on 2020-04-01


 Upcoming maintenance fee amounts

Description Date Amount
Next Payment if small entity fee 2021-04-07 $125.00
Next Payment if standard fee 2021-04-07 $255.00

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Payment History

Fee Type Anniversary Year Due Date Amount Paid Paid Date
Request for Examination $800.00 2012-09-25
Application Fee $400.00 2012-09-25
Maintenance Fee - Application - New Act 2 2013-04-08 $100.00 2013-03-21
Maintenance Fee - Application - New Act 3 2014-04-07 $100.00 2014-03-19
Maintenance Fee - Application - New Act 4 2015-04-07 $100.00 2015-03-19
Maintenance Fee - Application - New Act 5 2016-04-07 $200.00 2016-03-09
Maintenance Fee - Application - New Act 6 2017-04-07 $200.00 2017-02-24
Final Fee $300.00 2017-06-28
Maintenance Fee - Patent - New Act 7 2018-04-09 $200.00 2018-03-14
Maintenance Fee - Patent - New Act 8 2019-04-08 $200.00 2019-03-13
Maintenance Fee - Patent - New Act 9 2020-04-07 $200.00 2020-04-01
Current owners on record shown in alphabetical order.
Current Owners on Record
SARGENT AND GREENLEAF, INC.
Past owners on record shown in alphabetical order.
Past Owners on Record
None
Past Owners that do not appear in the "Owners on Record" listing will appear in other documentation within the application.

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Document
Description
Date
(yyyy-mm-dd)
Number of pages Size of Image (KB)
Claims 2015-02-12 2 66
Description 2015-02-12 12 626
Abstract 2012-09-25 2 87
Claims 2012-09-25 10 422
Drawings 2012-09-25 11 390
Description 2012-09-25 12 635
Representative Drawing 2012-11-21 1 24
Cover Page 2012-11-27 1 52
Description 2016-05-26 12 621
Claims 2016-05-26 2 68
PCT 2012-09-25 13 755
Assignment 2012-09-25 3 92
Correspondence 2012-11-20 1 21
Correspondence 2013-02-20 2 61
Prosecution-Amendment 2014-08-15 3 103
Prosecution-Amendment 2015-02-12 5 154
Prosecution-Amendment 2015-11-27 3 223
Prosecution-Amendment 2016-05-26 7 222
Fees 2017-02-24 1 22
Correspondence 2017-06-28 1 29
Representative Drawing 2017-07-13 1 21
Cover Page 2017-07-13 1 53